51033201509 has 2 divisors, whose sum is σ = 51033201510. Its totient is φ = 51033201508.

The previous prime is 51033201497. The next prime is 51033201671. The reversal of 51033201509 is 90510233015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44248384609 + 6784816900 = 210353^2 + 82370^2 .

It is a cyclic number.

It is not a de Polignac number, because 51033201509 - 2⁸ = 51033201253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51033401509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25516600754 + 25516600755.

It is an arithmetic number, because the mean of its divisors is an integer number (25516600755).

Almost surely, 2^51033201509 is an apocalyptic number.

It is an amenable number.

51033201509 is a deficient number, since it is larger than the sum of its proper divisors (1).

51033201509 is an equidigital number, since it uses as much as digits as its factorization.

51033201509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 29.

The spelling of 51033201509 in words is "fifty-one billion, thirty-three million, two hundred one thousand, five hundred nine".